Next.js and Jest: SyntaxError: Cannot use import statement outside a module

Question

我正在使用 TypeScript 开发一个 Next.js 项目，为了测试，我使用 Jest 和 React Testing Lib。但是，我遇到 SyntaxError: Cannot use import statement outside a module 对于我导入 rehype-raw.

的组件

据我了解，Jest不支持ES6所以node_modules可能需要改造一下。这可以使用 transformIgnorePatterns 进行配置。例如，如果 rehype-raw 导致此错误，使用 "transformIgnorePatterns": ["node_modules/(?!rehype-raw)/"] 应该允许转换 rehype-raw 但不允许其他模块。从而解决这个错误。

但是，这对我不起作用。但是我不知道为什么以及如何解决这个问题。我发现没有建议的解决方案可以解决这个问题。我在下面附上了我的错误输出、jest.config.js和babel.rc文件.

错误输出

 FAIL  test/pages/companies/[id].test.tsx                  
  ● Test suite failed to run

    Jest encountered an unexpected token

    [...]

    Details:

    /path/frontend-job/node_modules/rehype-raw/index.js:7
    import {raw} from 'hast-util-raw'
    ^^^^^^

    SyntaxError: Cannot use import statement outside a module

      3 | import Image from 'next/image';
      4 | import { Remark } from 'react-remark';
    > 5 | import rehypeRaw from 'rehype-raw';
        | ^
      6 | import rehypeSanitize from 'rehype-sanitize';
      7 | import { logError } from '@utils/logger';
      8 |

      at Runtime.createScriptFromCode (node_modules/jest-runtime/build/index.js:1728:14)
      at Object.<anonymous> (components/markdown/JobMarkdown.tsx:5:1)

jest.config.js

const { resolve } = require('path');

module.exports = {
  roots: ['<rootDir>'],
  moduleFileExtensions: ['js', 'jsx', 'ts', 'tsx', 'json', 'node'],
  setupFiles: ['<rootDir>/test/setup.js'],
  testPathIgnorePatterns: ['<rootDir>[/\\](node_modules|.next)[/\\]'],
  transform: {
    '^.+\.(ts|tsx)$': 'babel-jest',
  },
  transformIgnorePatterns: [
    'node_modules/(?!rehype-raw)/',
  ],
  watchPlugins: [
    'jest-watch-typeahead/filename',
    'jest-watch-typeahead/testname',
  ],
  moduleNameMapper: {
    // Force mocks: https://github.com/facebook/jest/issues/4262
    '@api/axios': '<rootDir>/test/__mocks__/axios.js',
    // Normal module aliases
    '\.(css|less|sass|scss)$': 'identity-obj-proxy',
    '\.(gif|ttf|eot|svg|png)$': '<rootDir>/test/__mocks__/fileMock.js',
    '^@test/(.*)$': resolve(__dirname, './test/'),
    '^@test/faker/(.*)$': resolve(__dirname, './test/faker/'),
    '^@components/(.*)$': resolve(__dirname, './components/'),
    '^@pages/(.*)$': resolve(__dirname, './pages/'),
    '^@utils/(.*)$': resolve(__dirname, './utils/'),
    '^@api/(.*)$': resolve(__dirname, './api/'),
    '^@store/(.*)$': resolve(__dirname, './store/'),
  },
  testEnvironment: 'jsdom',
};

babel.rc

{
  "presets": ["next/babel"]
}

Answer 1

您是否已经在 package.json 中使用过 type:"module"？

Answer 2

Next 已经 out-of-the-box 支持 Jest，建议您按照 provided in the docs.

的步骤操作

Next.js and Jest: SyntaxError: Cannot use import statement outside a module

Next.js and Jest: SyntaxError: Cannot use import statement outside a module

javascript

typescript

jestjs

next.js

babel-jest